1. Introduction The development of a multicellular organism begins with a single fertilized egg, yet that single cell eventually gives rise to hundreds of different cell types. Neurons, muscle cells, […]
1. Introduction Development of a multicellular organism is controlled by the coordinated activity of thousands of genes. These genes regulate: Cell division Cell differentiation Cell migration Cell-cell communication Tissue patterning […]
1. Introduction to Stem Cells Stem cells are a specialized population of cells characterized primarily by two fundamental properties: self-renewal and differentiation potential. Unlike terminally differentiated cells, which generally perform […]
1. Introduction In most genes, an individual normally possesses two copies or alleles: One inherited from the mother One inherited from the father Usually, both copies can contribute to gene […]
1. Introduction Multicellular organisms begin development from a single fertilized cell, the zygote. As development proceeds, cells divide repeatedly and gradually become specialized. A major question in developmental biology is: […]
1. Introduction The development of a multicellular organism begins with a relatively small number of cells and ultimately produces a highly organized body containing hundreds of specialized cell types. A […]
1. Introduction During embryonic development, cells continuously receive signals from neighboring cells and their surrounding environment. However, not every cell responds to every signal. A signaling molecule may be present […]
1. Introduction Morphogenesis is the biological process through which cells, tissues, and organs acquire their characteristic shape and spatial organization during development. A developing embryo contains cells that must determine […]
1. Introduction Induction is one of the fundamental mechanisms of developmental biology through which one group of cells influences the developmental fate or behavior of another group of cells. During […]
1. Introduction During development, cells do not immediately become fully specialized. Instead, they gradually acquire information about what type of cell they are likely to become. An early step in […]
